IEC 61786-1-2013 Measurement of DC magnetic AC magnetic and AC electric fields from 1 Hz to 100 kHz with regard to exposure of human beings - Part 1 Requirements for measuring inst.pdf

1、 IEC 61786-1 Edition 1.0 2013-12 INTERNATIONAL STANDARD NORME INTERNATIONALE Measurement of DC magnetic, AC magnetic and AC electric fields from 1 Hz to 100 kHz with regard to exposure of human beings Part 1: Requirements for measuring instruments Mesure de champs magntiques continus et de champs ma

2、gntiques et lectriques alternatifs dans la plage de frquences de 1 Hz 100 kHz dans leur rapport lexposition humaine Partie 1: Exigences applicables aux instruments de mesure IEC 61786-1:2013 HORIZONTAL STANDARD NORME HORIZONTALE colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2013 IE

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16、rnational (VEI) en ligne. Service Clients - webstore.iec.ch/csc Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 61786-1 Edition 1.0 2013-12 INTERNATIONAL STANDARD NORME INTERNATIONALE Measurement of DC magnetic, AC magnet

17、ic and AC electric fields from 1 Hz to 100 kHz with regard to exposure of human beings Part 1: Requirements for measuring instruments Mesure de champs magntiques continus et de champs magntiques et lectriques alternatifs dans la plage de frquences de 1 Hz 100 kHz dans leur rapport lexposition humain

18、e Partie 1: Exigences applicables aux instruments de mesure INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XAICS 17.220.20 PRICE CODE CODE PRIX ISBN 978-2-8322-1298-1 HORIZONTAL STANDARD NORME HORIZONTALE Registered trademark of the International Electrotechnica

19、l Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. colour inside 2 61786-1 IEC:2013 CONTENTS

20、FOREWORD . 4 1 Scope 6 2 Normative references 6 3 Terms and definitions 7 3.1 Meters . 7 3.2 Meter characteristics 8 3.3 Field characteristics . 9 3.4 Measurements . 10 4 Symbols 11 5 Instrumentation specifications . 12 5.1 General 12 5.2 Measurement uncertainty . 12 5.3 Magnitude range 13 5.4 Pass-

21、band . 13 5.5 Operating temperature and humidity ranges . 13 5.6 Power supplies 13 5.7 Readability of scale 14 5.8 Instrument dimensions and choice of probe . 14 5.8.1 General schema . 14 5.8.2 Magnetic field meter . 14 5.8.3 Electric field meter 15 5.8.4 Support for electric field meter 15 5.9 Elec

22、tromagnetic compatibility . 15 5.9.1 Immunity . 15 5.9.2 Emissions . 16 5.10 Crest factor 17 5.11 Durability . 17 5.12 Weight . 17 5.13 Instrumentation choice . 18 6 Calibration . 18 6.1 General 18 6.2 Calibration procedure . 18 6.2.1 General 18 6.2.2 Magnetic field calibration system 18 6.2.3 Elect

23、ric field calibration system . 19 6.2.4 Three-axis probes calibration 19 6.2.5 Calibration values . 19 6.2.6 Calibration uncertainty 20 6.3 Calibration documentation . 20 7 Verification 21 Annex A (normative) Calibration methods 22 Annex B (informative) Example of calibration uncertainty . 33 Annex

24、C (informative) General characteristics of magnetic and electric fields 35 Annex D (informative) Magnetic flux density meters (magnetic field meters) 39 61786-1 IEC:2013 3 Annex E (informative) Electric field strength meters (electric field meters) . 43 Annex F (informative) Influence of humidity on

25、 electric field measurement . 47 Annex G (informative) Units . 49 Bibliography 50 Figure 1 Schema of a field meter . 14 Figure 2 Insulating tripod and offset rod for an electric field probe (photograph RTE) . 15 Figure 3 Electric field measurement using a hand-held stick (photograph RTE) 15 Figure A

26、.1 Deviation in percentage departure of calculated axial field 7 . 22 Figure A.2 Coordinate system and geometry of rectangular loop of many turns of wire (see Equation (A. 1) . 23 Figure A.3 Circular Helmholtz coils 24 Figure A.4 Deviation in percentage of calculated B zfrom centre value (see Equati

27、on (A.4) 25 Figure A.5 Schematic view of a circuit for calibration of magnetic field meter using a square loop to produce a known field 25 Figure A.6 Diagram for voltage injection technique 27 Figure A.7 Calculated normalized electric field at plate surfaces and midway between plates as a function o

28、f the normalized distance from the edge of the plate 28 Figure A.8 Parallel plates system for calibrating free-body electric field meters . 30 Figure A.9 Arrangement with parallel plates orientated perpendicular to the floor . 31 Figure A.10 Diagram for current injection technique . 32 Figure C.1 Os

29、cillating and rotating field quantities for cases of elliptical polarization, linear polarization, and circular polarization 36 Figure C.2 Magnetic field from current in straight and circular conductors 37 Figure C.3 Perturbation of electric field distribution by a person (from IEC 62226-3-1) . 38 F

30、igure C.4 Proximity effect with a 25 kV line and a building (from IEC 62110) 38 Figure D.1 Schematic view of simple magnetic field meter with coil-type probe 39 Figure D.2 Approximate equivalent circuit of a coil probe when connected to the detector 41 Figure E.1 Single-axis free-body meter geometri

31、es 44 Figure E.2 Designs for flat plate probes used with ground-referenced electric field meters 45 Figure F.1 Test in the climatic chamber with the normal tripod (left) and the offset tripod (right) (photograph EDF R any IEC National Committee interested in the subject dealt with may participate in

32、 this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the

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36、al or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services ca

37、rried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National C

38、ommittees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is draw

39、n to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not

40、be held responsible for identifying any or all such patent rights. International Standard IEC 61786-1 has been prepared by IEC technical committee 106: Methods for the assessment of electric, magnetic and electromagnetic fields associated with human exposure. The first editions of IEC 61786-1 and IE

41、C 61786-2 replace IEC 61786:1998. Part 1 deals with measuring instruments, and Part 2 deals with measurement procedures. The content of the standard was revised in order to give up-to-date and practical information to the user. It has the status of a horizontal standard in accordance with IEC Guide

42、108. 61786-1 IEC:2013 5 The text of this standard is based on the following documents: FDIS Report on voting 106/292/FDIS 106/298/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted

43、in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 61786 series, published under the general title Measurement of DC magnetic fields and AC magnetic and electric fields from 1 Hz to 100 kHz with regard to exposure of human beings, can be found on the IEC website. The c

44、ommittee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised e

45、dition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. 6 61786-1 IEC:2013 MEASURE

46、MENT OF DC MAGNETIC, AC MAGNETIC AND AC ELECTRIC FIELDS FROM 1 Hz TO 100 kHz WITH REGARD TO EXPOSURE OF HUMAN BEINGS Part 1: Requirements for measuring instruments 1 Scope This part of IEC 61786 provides guidance for measuring instruments used to measure the field strength of quasi-static magnetic a

47、nd electric fields that have a frequency content in the range 1 Hz to 100 kHz and with DC magnetic fields to evaluate the exposure levels of the human body to these fields. Sources of fields include devices that operate at power frequencies and produce power frequency and power frequency harmonic fi

48、elds, as well as devices that produce fields within the frequency range of this document, including devices that produce static fields, and the earths static magnetic field. The magnitude ranges covered by this standard are 0,1 T to 200 mT in AC (1 T to 10 T in DC) and 1 V/m to 50 kV/m for magnetic

49、fields and electric fields, respectively. When measurements outside this range are performed, most of the provisions of this standard will still apply, but special attention should be paid to specified uncertainty and calibration procedures. Specifically, this standard defines terminology; identifies requirements on field meter specifications; indicates methods of calibration; defines requirements